[Morphological and histometrical study of normal adrenal gland in Lori-Bakhtiari sheep]

ABSTRACT

Comparison of dimensions and cortical zones of left and right adrenal glands in Lori-Bakhtiari sheep. Descriptive study. One hundered pairs of adrenal glands of Lori-Bakhtiari sheep. One hundered pairs of normal adrenal glands were collected in two age groups [6 month to 1 year and 1- 1.5 years old] from Shahrekord abattoir. After collecting the glands and weighing them, some parameters such as length, wide and thickness of them were measured by caliper device. For histological studies, after tissue preparation and H and E staining, cortical zones and medullae of glands were recognized. The size of zones were determined by micrometry. Values of left and right adrenal glands and two ages were analyzed. T-student test. There was a significant difference between dimensions of left and right adrenal glands. The mean weight and length of left adrenal gland was greater than the right. In 6 month to 1 year group the mean wide of right adrenal was greater than left and there was a significant difference between them. These Findings were in contrast to 1-1.5 years old group. All of measured parameters in 1- 1.5 years group were larger than 6 month to 1 year group [P<0.001]. Histological studies revealed that, there was a significant difference in size of zona fasiculata between left [2766.66 +/- 144.33 micro m] and right [3450.00 +/- 43.30 microm] adrenal glands in 1- 1.5 years group. In Lori-Bakhtiari sheep, dimensions of left adrenal gland was greater than the right one. The size of zona fasiculata in right adrenal gland was greater than the left one in 1-1.5 years group and the difference was significant [P<0.05]